Jacob monch



JQ MONCH. BOOK ULASP.

(No Model.)

No. 339,801. /i"1 a,tented Apr.

INVBNTOR 2 n l ,8 8 W 1 8 j/ U i .Mmx. & f 7 e J a 6 Q D Y Z z 1 U c U j m z w w y R. z W W6 II l vv\ ATTORNEY u, perms Photolilhagrlphlr. mmm ox.

UNTTED STATE PATENT OFFICE.

JACOB MONCH, or OFFENBAOH, enermfiymssrenon 'ro SIDNEY POSEN, or SAME PLACE.

BOOK-CLASP.

SPECIFICATION forming part of Letters Patent No. 339,801, dated Ap il 13, 1886. Application filed January 4, 1886. Serial No. 187,524. (No model.) Patented in Germany January 16, 1885, No. 32,370.

To all whom it may concern.-

Be it known that I, J AOOB MoNcH, of Offenbach, Germany, have invented a new and useful Improvement in Book-Clasps, of which the following is a specification, reference being had to the annexed drawings, forming a part thereof, in which Figure l is a perspective view of a part of a book to which my improved clasp has been applied, the clasp being shown in section. Fig. 2 is an end elevation, partly in section, of my improved clasp; and Fig. 3 represents a modified form of clasp.

Similar letters of reference indicate corresponding parts in the different figures of the drawings.

The object of my invention is to provide a clasp for books, albums, and files which may be expanded or contracted to accommodate it to the contents of the book, album, or file.

My invention consists in a hollow slotted pintle containing a threaded spindle, one half of which is threaded with a right-handed thread and the other half with a left-handed thread, nuts being placed 011 the screw, with ears projecting through theslots of the pintle and jointed to the ends of a pair of arms, which are themselves jointed together and capable of being spread or contracted by the right-andleft-hand screw, so as to shorten or lengthen the distance between the pintle and the extremity of the clasp-arm.

The plateA, which is attached to the bookcover in the usual way, is provided with apertured studs a, for receiving the tubular pintle B. The tubular pintle B is provided with a slot, Z), in one side thereof, and contains a screw, 0, upon one half of which is formed a right-hand thread and upon the other half a left-hand thread. The opposite ends of the screw are provided with heads D, by which the screw may be turned in one direction or the other, and upon the screw within the tubular pintle B are placed two nuts, C, at equal distances from the center of the screw, and each nut is provided with an ear, (I, which projects through the slot Z) of the tubular pint-le B.

The clasp-arm E, which is formed of two parts, e e, pivoted together upon an eyelet, f,

the eyelet f, bringing their ends nearer to gether and pushing out the free end of the clasp-arm, as indicated in dotted lines in Fig. 1, thus making the clasp longer, and adapting it to engage the pin y when the contents of the book, album, or file are increased. By 6 reversing the motion of the screw 0 the parts 6 e of the clasp-arm E are separated, thereby diminishing the length of the clasp arm.

By dispensing with the screw 0, and pro-- viding the ears (2 with slides d, nuts 0, and placing a spiral spring, a, in the tube B, between the slides d, as shown in Fig. 3, the arms 6 will be expanded automatically.

My improved clasp is always symmetrical in form, whether expanded or contracted, and it may be rendered ornamental by the addition of scroll-work, or in any other desirable way.

Having thus described my-invention, what I claim as new, and Patent, is

1. In a book-clasp, the combination of the arm E, formed of the parts e, the eyelet f, the parts e being jointed together upon the eyelet, and means for drawing the separating them, substantially as herein shown and described. I

2. In a book-clasp, the combination of the clasp-arm E, formed of the parts 6 e, jointed together, the tubular pintle B, left-hand screw 0, and nuts 0, provided with ears (I, and jointed to the ends of the parts e of the clasp-arm, substantially as herein shown and described.

3. In a book-clasp, the clasp-arm E, formed of the parts 0, jointed together upon the eyelet f, of the tubular pintle B, the right-and-left-hand screw 0, and

the opposite 55 instead of the desire to secure by Letters parts 0 together or the right-and 0 the combination, with 5 nuts 0, provided with ears (I, said ears being the clasp -arm E, formed of I the parts e e, jointed to the parts 6 of the arm E, as herein jointed: to each other and pivoted to the caustic specified. v d, the plate A, provided with a stud, g,

4. As an improved article of manufacture, gshei'ei specified. 5 a book-clasp formed of the plate A, provided Y with apertured studs a, V the s1o tted tuhuifih Witnesses:

JACOB M6NCH'.

pintle B, received in the studs, the se're'wfl JACOB MUELLER, h v

and nuts 0, inclosed by the tubular piutle, ALVESTO S. HOGUE. 6. 

